Study of the tensor correlation in a neutron-rich sd-shell region with the charge- and parity-projected Hartree-Fock method
- Kyoto University, Kyoto 606-8502 (Japan)
- Research Center for Nuclear Physics (RCNP), Osaka University, Osaka 567-0047 (Japan)
- The Institute of Physical and Chemical Research (RIKEN), Saitama 351-0198 (Japan)
We study the effect of the tensor force on nuclear structure with mean-field and beyond-mean-field methods. An important correlation induced by the tensor force is two-particle-two-hole (2p2h) correlation, which cannot be treated with a usual mean-filed method. To treat the 2p2h tensor correlation, we develop a new framework (charge- and parity-projected Hartree-Fock (CPPHF) method), which is a beyond-mean-field method. In the CPPHF method, we introduce single-particle states with parity and charge mixing. The parity and charge projections are performed on a total wave function before variation. We apply the CPPHF method to oxygen isotopes including neutron-rich ones. The potential energy from the tensor force has the same order of magnitude with that from the LS force and becomes smaller with neutron number, which indicates that excess neutrons do not contribute to the 2p2h tensor correlation significantly. We also study the effect of the tensor force on spin-orbit-splitting (ls-splitting) in a neutron-rich fluorine isotope {sup 23}F. The tensor force reduces the ls-splitting for the proton d-orbits by about 3 MeV. This effect is important to reproduce the experimental value. We also find that the 2p2h tensor correlation does not affect the ls-splitting in {sup 23}F.
- OSTI ID:
- 21143362
- Journal Information:
- AIP Conference Proceedings, Vol. 1012, Issue 1; Conference: FINUSTAR: 2. conference on Frontiers In NUclear STructure, Astrophysics and Reactions, Crete (Greece), 10-14 Sep 2007; Other Information: DOI: 10.1063/1.2939312; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of the tensor force in the exchange channel on the spin-orbit splitting in {sup 23}F in the Hartree-Fock framework
Study of the effect of the tensor correlation in oxygen isotopes with the charge- and parity-projected Hartree-Fock method